useradd
adduser
/etc/skel
userdel
removeuser
login inactive
userman
/etc/userman/config
/etc/userman/default
/etc/shadow
<username>:<password>:<date>:PASS_MIN_DAYS:PASS_MAX_DAYS:PASS_WARN_AGE:INACTIVE:EXPIRE:
〈사용자명〉:〈암호화된 비밀번호〉:〈마지막으로 비밀번호를 바꾼 날 짜〉:PASS_MIN_DAYS:PASS_MAX_DAYS:PASS_WARN_AGE:INACTIVE:EXPIRE
/etc/group
/etc/login.defs
chown
chmod
umask
suid
sgid
ruid
rgid
logins
chsh
passwd
usermod
change
newgrp
chgrp
group
groups
groupadd
groupdel
groupmod
grpck
pwck
pwconv
pwunconv
You can change the password aging any time using the chage command.
To disable password aging for system and shared accounts, you can run the following chage command:
# chage -M 99999 <system_account_name>
To get password expiration information:
# chage -l <system_account_name>
For example:
# chage -l test
Minimum: 7
Maximum: 60
Warning: 7
Inactive: 14
Last Change: Jan 11, 2005
Password Expires: Mar 12, 2005
Password Inactive: Mar 26, 2005
Account Expires: Never
permition, gpasswd